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  1. /*
  2.  * Copyright (C) 2006 Ondrej Palkovsky
  3.  * All rights reserved.
  4.  *
  5.  * Redistribution and use in source and binary forms, with or without
  6.  * modification, are permitted provided that the following conditions
  7.  * are met:
  8.  *
  9.  * - Redistributions of source code must retain the above copyright
  10.  *   notice, this list of conditions and the following disclaimer.
  11.  * - Redistributions in binary form must reproduce the above copyright
  12.  *   notice, this list of conditions and the following disclaimer in the
  13.  *   documentation and/or other materials provided with the distribution.
  14.  * - The name of the author may not be used to endorse or promote products
  15.  *   derived from this software without specific prior written permission.
  16.  *
  17.  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18.  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19.  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20.  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21.  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22.  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23.  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24.  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25.  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26.  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27.  */
  28.  
  29. /** @addtogroup genarch
  30.  * @{
  31.  */
  32. /** @file
  33.  */
  34.  
  35. #include <genarch/fb/font-8x16.h>
  36. #include <genarch/fb/fb.h>
  37. #include <console/chardev.h>
  38. #include <console/console.h>
  39. #include <sysinfo/sysinfo.h>
  40. #include <mm/slab.h>
  41. #include <align.h>
  42. #include <panic.h>
  43. #include <memstr.h>
  44. #include <config.h>
  45. #include <bitops.h>
  46. #include <print.h>
  47.  
  48. #include "helenos.xbm"
  49.  
  50. SPINLOCK_INITIALIZE(fb_lock);
  51.  
  52. static uint8_t *fbaddress = NULL;
  53.  
  54. static uint8_t *blankline = NULL;
  55. static uint8_t *dbbuffer = NULL; /* Buffer for fast scrolling console */
  56. static int dboffset;
  57.  
  58. static unsigned int xres = 0;
  59. static unsigned int yres = 0;
  60. static unsigned int scanline = 0;
  61. static unsigned int bitspp = 0;
  62. static unsigned int pixelbytes = 0;
  63.  
  64. static unsigned int position = 0;
  65. static unsigned int columns = 0;
  66. static unsigned int rows = 0;
  67.  
  68.  
  69. #define COL_WIDTH   8
  70. #define ROW_BYTES   (scanline * FONT_SCANLINES)
  71.  
  72. #define BGCOLOR     0x000080
  73. #define FGCOLOR     0xffff00
  74. #define LOGOCOLOR   0x2020b0
  75.  
  76. #define RED(x, bits)    ((x >> (16 + 8 - bits)) & ((1 << bits) - 1))
  77. #define GREEN(x, bits)  ((x >> (8 + 8 - bits)) & ((1 << bits) - 1))
  78. #define BLUE(x, bits)   ((x >> (8 - bits)) & ((1 << bits) - 1))
  79.  
  80. #define POINTPOS(x, y)  ((y) * scanline + (x) * pixelbytes)
  81.  
  82. /***************************************************************/
  83. /* Pixel specific fuctions */
  84.  
  85. static void (*rgb2scr)(void *, int);
  86. static int (*scr2rgb)(void *);
  87.  
  88. /* Conversion routines between different color representations */
  89. static void rgb_4byte(void *dst, int rgb)
  90. {
  91.     *(int *)dst = rgb;
  92. }
  93.  
  94. static int byte4_rgb(void *src)
  95. {
  96.     return (*(int *)src) & 0xffffff;
  97. }
  98.  
  99. static void rgb_3byte(void *dst, int rgb)
  100. {
  101.     uint8_t *scr = dst;
  102. #if (defined(BIG_ENDIAN) || defined(FB_BIG_ENDIAN))
  103.     scr[0] = RED(rgb, 8);
  104.     scr[1] = GREEN(rgb, 8);
  105.     scr[2] = BLUE(rgb, 8);
  106. #else
  107.     scr[2] = RED(rgb, 8);
  108.     scr[1] = GREEN(rgb, 8);
  109.     scr[0] = BLUE(rgb, 8);
  110. #endif
  111. }
  112.  
  113. static int byte3_rgb(void *src)
  114. {
  115.     uint8_t *scr = src;
  116. #if (defined(BIG_ENDIAN) || defined(FB_BIG_ENDIAN))
  117.     return scr[0] << 16 | scr[1] << 8 | scr[2];
  118. #else
  119.     return scr[2] << 16 | scr[1] << 8 | scr[0];
  120. #endif 
  121. }
  122.  
  123. /**  16-bit depth (5:6:5) */
  124. static void rgb_2byte(void *dst, int rgb)
  125. {
  126.     /* 5-bit, 6-bits, 5-bits */
  127.     *((uint16_t *)(dst)) = RED(rgb, 5) << 11 | GREEN(rgb, 6) << 5 | BLUE(rgb, 5);
  128. }
  129.  
  130. /** 16-bit depth (5:6:5) */
  131. static int byte2_rgb(void *src)
  132. {
  133.     int color = *(uint16_t *)(src);
  134.     return (((color >> 11) & 0x1f) << (16 + 3)) | (((color >> 5) & 0x3f) << (8 + 2)) | ((color & 0x1f) << 3);
  135. }
  136.  
  137. /** Put pixel - 8-bit depth (color palette/3:2:3)
  138.  *
  139.  * Even though we try 3:2:3 color scheme here, an 8-bit framebuffer
  140.  * will most likely use a color palette. The color appearance
  141.  * will be pretty random and depend on the default installed
  142.  * palette. This could be fixed by supporting custom palette
  143.  * and setting it to simulate the 8-bit truecolor.
  144.  */
  145. static void rgb_1byte(void *dst, int rgb)
  146. {
  147.     *(uint8_t *)dst = RED(rgb, 3) << 5 | GREEN(rgb, 2) << 3 | BLUE(rgb, 3);
  148. }
  149.  
  150. /** Return pixel color - 8-bit depth (color palette/3:2:3)
  151.  *
  152.  * See the comment for rgb_1byte().
  153.  */
  154. static int byte1_rgb(void *src)
  155. {
  156.     int color = *(uint8_t *)src;
  157.     return (((color >> 5) & 0x7) << (16 + 5)) | (((color >> 3) & 0x3) << (8 + 6)) | ((color & 0x7) << 5);
  158. }
  159.  
  160. static void putpixel(unsigned int x, unsigned int y, int color)
  161. {
  162.     (*rgb2scr)(&fbaddress[POINTPOS(x,y)],color);
  163.  
  164.     if (dbbuffer) {
  165.         int dline = (y + dboffset) % yres;
  166.         (*rgb2scr)(&dbbuffer[POINTPOS(x,dline)],color);
  167.     }
  168. }
  169.  
  170. /** Get pixel from viewport */
  171. static int getpixel(unsigned int x, unsigned int y)
  172. {
  173.     if (dbbuffer) {
  174.         int dline = (y + dboffset) % yres;
  175.         return (*scr2rgb)(&dbbuffer[POINTPOS(x,dline)]);
  176.     }
  177.     return (*scr2rgb)(&fbaddress[POINTPOS(x,y)]);
  178. }
  179.  
  180.  
  181. /** Fill screen with background color */
  182. static void clear_screen(void)
  183. {
  184.     unsigned int y;
  185.  
  186.     for (y = 0; y < yres; y++) {
  187.         memcpy(&fbaddress[scanline*y], blankline, xres*pixelbytes);
  188.         if (dbbuffer)
  189.             memcpy(&dbbuffer[scanline*y], blankline, xres*pixelbytes);
  190.     }
  191. }
  192.  
  193.  
  194. /** Scroll screen one row up */
  195. static void scroll_screen(void)
  196. {
  197.     uint8_t *lastline = &fbaddress[(rows - 1) * ROW_BYTES];
  198.     int firstsz;
  199.  
  200.     if (dbbuffer) {
  201.         memcpy(&dbbuffer[dboffset*scanline], blankline, FONT_SCANLINES*scanline);
  202.        
  203.         dboffset = (dboffset + FONT_SCANLINES) % yres;
  204.         firstsz = yres-dboffset;
  205.  
  206.         memcpy(fbaddress, &dbbuffer[scanline*dboffset], firstsz*scanline);
  207.         memcpy(&fbaddress[firstsz*scanline], dbbuffer, dboffset*scanline);
  208.     } else {
  209.         memcpy((void *) fbaddress, (void *) &fbaddress[ROW_BYTES], scanline * yres - ROW_BYTES);
  210.         /* Clear last row */
  211.         memcpy((void *) lastline, (void *) blankline, ROW_BYTES);
  212.     }
  213. }
  214.  
  215.  
  216. static void invert_pixel(unsigned int x, unsigned int y)
  217. {
  218.     putpixel(x, y, ~getpixel(x, y));
  219. }
  220.  
  221.  
  222. /** Draw one line of glyph at a given position */
  223. static void draw_glyph_line(unsigned int glline, unsigned int x, unsigned int y)
  224. {
  225.     unsigned int i;
  226.  
  227.     for (i = 0; i < 8; i++)
  228.         if (glline & (1 << (7 - i))) {
  229.             putpixel(x + i, y, FGCOLOR);
  230.         } else
  231.             putpixel(x + i, y, BGCOLOR);
  232. }
  233.  
  234. /***************************************************************/
  235. /* Character-console functions */
  236.  
  237. /** Draw character at given position */
  238. static void draw_glyph(uint8_t glyph, unsigned int col, unsigned int row)
  239. {
  240.     unsigned int y;
  241.  
  242.     for (y = 0; y < FONT_SCANLINES; y++)
  243.         draw_glyph_line(fb_font[glyph * FONT_SCANLINES + y], col * COL_WIDTH, row * FONT_SCANLINES + y);
  244. }
  245.  
  246. /** Invert character at given position */
  247. static void invert_char(unsigned int col, unsigned int row)
  248. {
  249.     unsigned int x;
  250.     unsigned int y;
  251.  
  252.     for (x = 0; x < COL_WIDTH; x++)
  253.         for (y = 0; y < FONT_SCANLINES; y++)
  254.             invert_pixel(col * COL_WIDTH + x, row * FONT_SCANLINES + y);
  255. }
  256.  
  257. /** Draw character at default position */
  258. static void draw_char(char chr)
  259. {
  260.     draw_glyph(chr, position % columns, position / columns);
  261. }
  262.  
  263. static void draw_logo(unsigned int startx, unsigned int starty)
  264. {
  265.     unsigned int x;
  266.     unsigned int y;
  267.     unsigned int byte;
  268.     unsigned int rowbytes;
  269.  
  270.     rowbytes = (helenos_width - 1) / 8 + 1;
  271.  
  272.     for (y = 0; y < helenos_height; y++)
  273.         for (x = 0; x < helenos_width; x++) {
  274.             byte = helenos_bits[rowbytes * y + x / 8];
  275.             byte >>= x % 8;
  276.             if (byte & 1)
  277.                 putpixel(startx + x, starty + y, LOGOCOLOR);
  278.         }
  279. }
  280.  
  281. /***************************************************************/
  282. /* Stdout specific functions */
  283.  
  284. static void invert_cursor(void)
  285. {
  286.     invert_char(position % columns, position / columns);
  287. }
  288.  
  289. /** Print character to screen
  290.  *
  291.  *  Emulate basic terminal commands
  292.  */
  293. static void fb_putchar(chardev_t *dev, char ch)
  294. {
  295.     spinlock_lock(&fb_lock);
  296.    
  297.     switch (ch) {
  298.         case '\n':
  299.             invert_cursor();
  300.             position += columns;
  301.             position -= position % columns;
  302.             break;
  303.         case '\r':
  304.             invert_cursor();
  305.             position -= position % columns;
  306.             break;
  307.         case '\b':
  308.             invert_cursor();
  309.             if (position % columns)
  310.                 position--;
  311.             break;
  312.         case '\t':
  313.             invert_cursor();
  314.             do {
  315.                 draw_char(' ');
  316.                 position++;
  317.             } while ((position % 8) && position < columns * rows);
  318.             break;
  319.         default:
  320.             draw_char(ch);
  321.             position++;
  322.     }
  323.    
  324.     if (position >= columns * rows) {
  325.         position -= columns;
  326.         scroll_screen();
  327.     }
  328.    
  329.     invert_cursor();
  330.    
  331.     spinlock_unlock(&fb_lock);
  332. }
  333.  
  334. static chardev_t framebuffer;
  335. static chardev_operations_t fb_ops = {
  336.     .write = fb_putchar,
  337. };
  338.  
  339.  
  340. /** Initialize framebuffer as a chardev output device
  341.  *
  342.  * @param addr  Physical address of the framebuffer
  343.  * @param x     Screen width in pixels
  344.  * @param y     Screen height in pixels
  345.  * @param bpp   Bits per pixel (8, 16, 24, 32)
  346.  * @param scan  Bytes per one scanline
  347.  * @param align Request alignment for 24bpp mode.
  348.  */
  349. void fb_init(uintptr_t addr, unsigned int x, unsigned int y, unsigned int bpp, unsigned int scan, bool align)
  350. {
  351.     switch (bpp) {
  352.         case 8:
  353.             rgb2scr = rgb_1byte;
  354.             scr2rgb = byte1_rgb;
  355.             pixelbytes = 1;
  356.             break;
  357.         case 16:
  358.             rgb2scr = rgb_2byte;
  359.             scr2rgb = byte2_rgb;
  360.             pixelbytes = 2;
  361.             break;
  362.         case 24:
  363.             rgb2scr = rgb_3byte;
  364.             scr2rgb = byte3_rgb;
  365.             if (align)
  366.                 pixelbytes = 4;
  367.             else
  368.                 pixelbytes = 3;
  369.             break;
  370.         case 32:
  371.             rgb2scr = rgb_4byte;
  372.             scr2rgb = byte4_rgb;
  373.             pixelbytes = 4;
  374.             break;
  375.         default:
  376.             panic("Unsupported bpp");
  377.     }
  378.    
  379.     unsigned int fbsize = scan * y;
  380.    
  381.     /* Map the framebuffer */
  382.     fbaddress = (uint8_t *) hw_map((uintptr_t) addr, fbsize);
  383.    
  384.     xres = x;
  385.     yres = y;
  386.     bitspp = bpp;
  387.     scanline = scan;
  388.    
  389.     rows = y / FONT_SCANLINES;
  390.     columns = x / COL_WIDTH;
  391.  
  392.     sysinfo_set_item_val("fb", NULL, true);
  393.     sysinfo_set_item_val("fb.kind", NULL, 1);
  394.     sysinfo_set_item_val("fb.width", NULL, xres);
  395.     sysinfo_set_item_val("fb.height", NULL, yres);
  396.     sysinfo_set_item_val("fb.bpp", NULL, bpp);
  397.     sysinfo_set_item_val("fb.scanline", NULL, scan);
  398.     sysinfo_set_item_val("fb.address.physical", NULL, addr);
  399.  
  400.     /* Allocate double buffer */
  401.     int totsize = scanline * yres;
  402.     int pages = SIZE2FRAMES(totsize);
  403.     int order;
  404.     if (pages == 1)
  405.         order = 0;
  406.     else
  407.         order = fnzb(pages-1)+1;
  408.  
  409.     dbbuffer = frame_alloc(order,FRAME_ATOMIC | FRAME_KA);
  410.     if (!dbbuffer)
  411.         printf("Failed to allocate scroll buffer.\n");
  412.     dboffset = 0;
  413.  
  414.     /* Initialized blank line */
  415.     blankline = (uint8_t *) malloc(ROW_BYTES, FRAME_ATOMIC);
  416.     if (!blankline)
  417.         panic("Failed to allocate blank line for framebuffer.");
  418.     for (y=0; y < FONT_SCANLINES; y++)
  419.         for (x=0; x < xres; x++)
  420.             (*rgb2scr)(&blankline[POINTPOS(x,y)],BGCOLOR);
  421.  
  422.     clear_screen();
  423.  
  424.     /* Update size of screen to match text area */
  425.     yres = rows * FONT_SCANLINES;
  426.  
  427.     draw_logo(xres - helenos_width, 0);
  428.     invert_cursor();
  429.  
  430.     chardev_initialize("fb", &framebuffer, &fb_ops);
  431.     stdout = &framebuffer;
  432.    
  433. }
  434.  
  435. /** @}
  436.  */
  437.